2 files changed, 109 insertions, 0 deletions
diff --git a/pkgs/simple/xoutinfo/default.nix b/pkgs/simple/xoutinfo/default.nix
new file mode 100644
index 0000000..92dbb42
--- /dev/null
+++ b/pkgs/simple/xoutinfo/default.nix
@@ -0,0 +1,19 @@
+{ lib, pkgs }:
+
+pkgs.runCommand "xoutinfo-1.0.0" {} /* sh */ ''
+  mkdir -p $out/bin
+
+  cp ${./xoutinfo.sh} $out/bin/xoutinfo
+  sed -i '
+    s|#! /bin/sh|#! ${pkgs.dash}/bin/dash|
+    s|^export AWKPATH=.*|export AWKPATH=${lib.makeSearchPath "/lib/awk" [
+      pkgs.awklib
+    ]}|
+    s|#PATH=|PATH=${lib.makeBinPath [
+      pkgs.coreutils
+      pkgs.gawk
+      pkgs.xdotool
+      pkgs.xorg.xrandr
+    ]}|
+  ' $out/bin/xoutinfo
+''
diff --git a/pkgs/simple/xoutinfo/xoutinfo.sh b/pkgs/simple/xoutinfo/xoutinfo.sh
new file mode 100755
index 0000000..3353cbe
--- /dev/null
+++ b/pkgs/simple/xoutinfo/xoutinfo.sh
@@ -0,0 +1,90 @@
+#! /bin/sh
+# usage: xoutinfo
+
+set -efu
+
+#PATH=
+export AWKPATH=$HOME/sync/src/hrm/pkgs/simple/awklib/src/lib/awk
+
+{
+  echo derp
+  xrandr --query --nograb
+  echo Screen 7: derp
+  echo bah
+} |
+awk \
+  $(
+    # assign X, Y, SCREEN, and WINDOW variables
+    xdotool getmouselocation --shell --prefix '-v ' | tr '\n' ' '
+  ) \
+'
+  @include "json"
+
+  function dprint(x) {
+    #print(x) > "/dev/stderr"
+  }
+
+  BEGIN {
+    default_dpi = 96
+    skip = mkbool(1)
+  }
+  $1 == "Screen" { skip=mkbool($2!=SCREEN":") }
+
+  { dprint( (skip?"skip:\033[31m":"read:\033[32m") $0 "\033[m") }
+
+  skip { next }
+
+  $2 == "connected" {
+    # Example line:
+    # HDMI-A-0 connected 3840x2160+0+0 (normal left inverted right x axis y axis) 597mm x 336mm
+
+    sub(/ [(][^)]+[)]/, "")
+
+    # Get physical width and height [in mm]
+    split(gensub(/^.* ([0-9]+)mm x ([0-9]+)mm$/, "\\1 \\2", 1), physical_geometry)
+    if (/\<left\>/ || /\<right\>/) {
+      pw=strtonum(physical_geometry[2])
+      ph=strtonum(physical_geometry[1])
+    } else {
+      pw=strtonum(physical_geometry[1])
+      ph=strtonum(physical_geometry[2])
+    }
+
+    name=$1
+    split(gensub(/^.* ([0-9]+x[0-9]+\+[0-9]+\+[0-9]+) .*$/, "\\1", 1), geometry, /[x+]/)
+    w=strtonum(geometry[1])
+    h=strtonum(geometry[2])
+    x=strtonum(geometry[3])
+    y=strtonum(geometry[4])
+
+    dpi_x = w / pw * 25.4
+    dpi_y = h / ph * 25.4
+
+    # This assumes DPI has not been configured
+    # (e.g. by passing -dpi to X or calling xrandr --dpi)
+    device_scale_factor = dpi_x / default_dpi
+
+    is_current_display=(x <= X && X < x + w && y <= Y && Y < y + h)
+
+    if (is_current_display) {
+      output["name"] = name
+      output["width"] = w
+      output["height"] = h
+      output["x"] = x
+      output["y"] = y
+      output["width_mm"] = pw
+      output["height_mm"] = ph
+      output["dpi_x"] = dpi_x
+      output["dpi_y"] = dpi_y
+      output["device_scale_factor"] = device_scale_factor
+      print toJSON(output)
+      delete output
+    }
+
+    dprint(name " " w "x" h "+" x "+" y " is_current_display:" is_current_display)
+    dprint("physical_geometry:" pw "mm" "x" ph "mm" ", dpi:" dpi_x "," dpi_y ", 0:" $0 \
+          ", device_scale_factor:" device_scale_factor)
+    dprint("X:" X)
+    dprint("Y:" Y)
+  }
+'